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提高计算精度和运算效率是所有波场正演方法所追求的目标，本文通过将速度 （应力）对时间的奇数阶高阶寻数转化为应力（速度）对空间的导数，运用时间和空间差分精度 均可达任意阶的高阶差分法，通过交错网格技术，对一阶速度－应力弹性波方程进行了数值求 解．波场快照以及实际模型的正演结果表明，这种求解一阶弹性波方程的高阶差分解法，和 常规的差分法相比网格频散显著减小，精度明显提高，而且可以取较大的空间步长，提高计算 效率。
To improve the accuracy and efficiency of the wavefields is the goal pursued by all wavefield forward modeling methods. In this paper, we transform the odd-order high order of velocity (stress) to the derivative of stress (velocity) into space, and use the difference of time and space The high-order difference method can achieve arbitrary orders of precision. By using the staggered-grid technique, the first-order velocity-stress elastic wave equation is numerically solved. The snapshots of the wavefield and the forward modeling of the actual model show that this high-order difference method for solving the first-order elastic wave equation reduces the grid dispersion significantly compared to the conventional difference method, and the accuracy is significantly improved, and the larger Space steps to improve computational efficiency.